Important National and International Days

World Tourism Day is celebrated annually on September 27th. It was established by the United Nations World Tourism Organization (UNWTO) in 1980 to promote global awareness of tourism's social, cultural, political, and economic value. September 27 was chosen to mark the anniversary of the adoption of UNWTO statutes in 1970.

Sachin Tendulkar was born on April 24, 1973. This is a well-documented fact in cricket history. The other dates (May 28, June 25, March 22) are incorrect and do not match his actual birth date.

Saint Nicholas Day is celebrated on December 6th, commemorating the death of Saint Nicholas of Myra (the historical inspiration for Santa Claus). This is the traditional feast day in many European countries.

World Literacy Day is officially celebrated on September 8th each year, as proclaimed by UNESCO in 1966. The day aims to highlight the importance of literacy to individuals, communities, and societies. The other dates are not associated with this observance.

Christmas is celebrated on December 25th annually in Christian tradition worldwide, commemorating the birth of Jesus Christ. The other dates (22nd, 23rd, 24th) are close but incorrect.

Swiss National Day is celebrated on August 1st, commemorating the founding of the Swiss Confederation in 1291 when three cantons signed the Federal Charter. This is Switzerland's only national holiday.

Michael Jackson died on 25 June 2009 at his home in Los Angeles. His death in June 2009 is well-documented - he was preparing for his 'This Is It' concert series when he suffered cardiac arrest. The other months are incorrect: he died in late June, not May, July, or April. The claimed answer C (June) is correct.

Emerald is traditionally recognized as the birthstone for May. December has turquoise/zircon, June has pearl, and January has garnet. Birthstone traditions date back to biblical times and the Breastplate of Aaron.

The 2010 Commonwealth Games were held in Delhi during October. This was a major multi-sport event hosted by India, with the opening ceremony on October 3 and closing ceremony on October 14, 2010.

Ratan Tata was born on December 28, 1937. He is one of India's most prominent industrialists and former chairman of the Tata Group. This is factual biographical information about the famous business leader.

Isaac Newton was born on January 4, 1643 (according to the Gregorian calendar). He was the physicist who formulated the laws of motion and universal gravitation. Note the spelling 'Isaac' not 'Issac' in the question.

N. T. Rama Rao, the famous Indian actor and politician, was born on May 28, 1923. He served as the Chief Minister of Andhra Pradesh and was a legendary figure in Telugu cinema. This is factual biographical information.

A. P. J. Abdul Kalam, the former President of India and missile scientist, was born on October 15, 1931. He is known as the 'Missile Man of India' and was a beloved figure. This is factual biographical information. Note the capitalization issue in the question.

World Environment Day is observed annually on June 5th. This day was established by the United Nations in 1974 to raise awareness about environmental protection and encourage action for environmental conservation. It is not observed in January or December.